| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 20 | 
                                    
                                    2.9%
                                 | 
| 0 | 427 | 
                                    
                                    62.9%
                                 | |
| 2 | 1 | 
                                    
                                    0.1%
                                 | |
| 3 | 1 | 
                                    
                                    0.1%
                                 | |
| 5 | 3 | 
                                    
                                    0.4%
                                 | |
| 9 | 1 | 
                                    
                                    0.1%
                                 | |
| 10 | 12 | 
                                    
                                    1.8%
                                 | |
| 11 | 1 | 
                                    
                                    0.1%
                                 | |
| 13 | 1 | 
                                    
                                    0.1%
                                 | |
| 14 | 1 | 
                                    
                                    0.1%
                                 | |
| 15 | 1 | 
                                    
                                    0.1%
                                 | |
| 19 | 1 | 
                                    
                                    0.1%
                                 | |
| 20 | 17 | 
                                    
                                    2.5%
                                 | |
| 25 | 2 | 
                                    
                                    0.3%
                                 | |
| 30 | 13 | 
                                    
                                    1.9%
                                 | |
| 34 | 1 | 
                                    
                                    0.1%
                                 | |
| 35 | 2 | 
                                    
                                    0.3%
                                 | |
| 38 | 1 | 
                                    
                                    0.1%
                                 | |
| 40 | 9 | 
                                    
                                    1.3%
                                 | |
| 46 | 1 | 
                                    
                                    0.1%
                                 | |
| 50 | 17 | 
                                    
                                    2.5%
                                 | |
| 55 | 1 | 
                                    
                                    0.1%
                                 | |
| 58 | 1 | 
                                    
                                    0.1%
                                 | |
| 60 | 15 | 
                                    
                                    2.2%
                                 | |
| 61 | 1 | 
                                    
                                    0.1%
                                 | |
| 62 | 1 | 
                                    
                                    0.1%
                                 | |
| 63 | 1 | 
                                    
                                    0.1%
                                 | |
| 65 | 1 | 
                                    
                                    0.1%
                                 | |
| 70 | 11 | 
                                    
                                    1.6%
                                 | |
| 75 | 2 | 
                                    
                                    0.3%
                                 | |
| 80 | 24 | 
                                    
                                    3.5%
                                 | |
| 82 | 1 | 
                                    
                                    0.1%
                                 | |
| 83 | 3 | 
                                    
                                    0.4%
                                 | |
| 84 | 2 | 
                                    
                                    0.3%
                                 | |
| 85 | 4 | 
                                    
                                    0.6%
                                 | |
| 90 | 26 | 
                                    
                                    3.8%
                                 | |
| 92 | 1 | 
                                    
                                    0.1%
                                 | |
| 95 | 7 | 
                                    
                                    1%
                                 | |
| 98 | 5 | 
                                    
                                    0.7%
                                 | |
| 99 | 5 | 
                                    
                                    0.7%
                                 | |
| 100 | 34 | 
                                    
                                    5%
                                 | |
| Sysmiss | 276 |